Great Barrier Reef
It's the only living thing visible from space. The Great Barrier Reef isn't just a coral reef—it's an entire ecosystem the size of Italy: 2,300 kilometers along Australia's coast, 900 islands, 2,900 individual reefs, and an unimaginable diversity of life. When you first dip your head underwater here, it takes your breath away—it's like being inside a BBC documentary, except everything is real and happening right now.
An Underwater City
The reef was built by tiny organisms—coral polyps that over millions of years created the largest structure ever built by living creatures. More than 1,500 fi...
